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Finding the Fourth Proportional to 356.96, 490.05 and 347.91

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Solution

The fourth proportional to 356.96, 490.05 and 347.91 is: 477.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.96 : 490.05 = 347.91 : x
  2. Step 2: Convert to fraction form
    356.96/490.05 = 347.91/x
  3. Step 3: Cross multiply
    356.96x = 490.05 × 347.91
  4. Step 4: Simplify right side
    356.96x = 170,493.30
  5. Step 5: Solve for x
    x = 170,493.30/356.96
  6. Step 6: Final answer
    x = 477.63

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.